MICROFRONTENDS

@tomastrajan

BY

Surprisingly Easy Way To Build

WITH ANGULAR

bit.ly/31rkxFg

@tomastrajan

TOMAS TRAJAN

CONSULTANT, ANGULAR TRAINER, BLOGGER, SPEAKER...

INTERNATIONAL SPEAKER

@tomastrajan

ANGULAR

TRAINER

🔗 medium.com/@tomastrajan

goo.gl/Szv3hU 

ANGULAR BLOG

@tomastrajan

🔗 github.com/tomastrajan

✅ best practices

✅ Angular Material components

✅ NgRx 8 state management

✅ theming support

✅ 30+ contributors

✅ unit / e2e testing

ANGULAR STARTER

2200+

⭐

@tomastrajan

@releasebutler

🔗 releasebutler.now.sh

MAKER OF

@tomastrajan

@tomastrajan

TELL ME ABOUT YOURSELF

@tomastrajan

REFRESHER

@tomastrajan

VANILLA WEB

🍜SPAGHETTI CODE

@tomastrajan

COMPONENTS*

CREATED WITH THE HELP OF FRONTEND FRAMEWORKS AND LIBRARIES....

@tomastrajan

<p>          vs        <todo-item>

  • show text
  • use styling
  • some css animations
  • show text
  • use styling
  • some css animations
  • toggle
  • assign to user
  • set deadline
  • tag
  • ....

@tomastrajan

COMPONENTS

  • re-usability
  • encapsulation
  • reduction of complexity
  • framework / library specific
  • not reusable across projects

@tomastrajan

WEBCOMPONENTS

@tomastrajan

...GETS CRAZY

             PRETTY FAST

  • vanilla DOM APIs
  • manual management of props and attributes
  • life-cycle hooks
  • by default only primitive values in attributes
  • custom events are verbose
  • methods vs declarative data passing

@tomastrajan

BUT...

@tomastrajan

WEB COMPONENTS

  • more reusable
  • framework independent
  • better encapsulation (shadow DOM)
  • future proof (in theory)

@tomastrajan

ANGULAR ELEMENTS

...AKA WRITE ANGULAR AND GET VANILLA WEBCOMPONENTS

@tomastrajan

ANGULAR ELEMENTS

@tomastrajan

ANGULAR ELEMENTS

@tomastrajan

STORY TIME

@tomastrajan

THE  MONOLITH

@tomastrajan

THE 100+

ANGULAR SPAS

@tomastrajan

library

@tomastrajan

@tomastrajan

library

@tomastrajan

@tomastrajan

USE CASES

bit.ly/3dJMEls

LEARN MORE

1. sub-applications

2. Full microfrontends solutions

3. LAZY heavy 3rd party component

NOT THE BEST MATCH FOR COMPONENT LIBRARIES

@tomastrajan

THE LIB

@angular-extensions/elements

@tomastrajan

ELEMENTS ALREADY WORK SO WHY LIB?

@tomastrajan

BY DEFAULT WE HAVE 2 OPTIONS

@tomastrajan

👎 EAGER LOADING

👍 STANDARD ANGULAR 

         TEMPLATE BINDINGS

@tomastrajan

👍 LAZY LOADING

👎IMPERATIVE AttRIbuTE

        AND EVENT BINDING

@tomastrajan

WHAT WE WANT?

@tomastrajan

LAZY LOADING

&

STANDARD ANGULAR TEMPLATE BINDINGS

@tomastrajan

👍 LAZY LOADING

👍 STANDARD ANGULAR 

         TEMPLATE BINDINGS

@tomastrajan

HOW DOES IT WORK?

@tomastrajan

  • The * signifies Angular structural directive
  • The element is removed from the DOM
  • Directive can inject the element template reference in its constructor
  • And use it to render element back once the elements bundle was loaded!

@tomastrajan

STANDARD ANGULAR DIRECTIVE

SIMPLIFIED VERSION 😅

@tomastrajan

RETRIEVE URL

<some-component 
  *axLazyElement="https://my-org.com/some-component.js">
</some-component>

@tomastrajan

INJECT TEMPLATE REFERENCE

...AND A SERVICE WHICH

   IMPLEMENTS ELEMENT

   LOADING (CREATE SCRIPT TAG)

@tomastrajan

RETRIEVE ELEMENT TAG FROM THE TEMPLATE

@tomastrajan

CALL LOADER SERVICE WITH URL & TAG

@tomastrajan

ONCE LOADED, RENDER TEMPLATE BACK TO THE DOM

@tomastrajan

AND HANDLE POTENTIAL ERRORS 😉

@tomastrajan

 BUT WHAT ABOUT THE SERVICE?

@tomastrajan

STANDARD ANGULAR SERVICE

VERY SIMPLIFIED VERSION 😅

@tomastrajan

CREATE URL / PROMISE MAP

TO PREVENT MULTIPLE DOWNLOADS OF A SINGLE ELEMENT BUNDLE!

@tomastrajan

ADD LOADELEMENT METHOD AS USED IN THE *AXLAZYELEMENT DIRECTIVE

@tomastrajan

WHEN LOADING, FIRST CHECK IF WE ALREADY HAVE SUCH AN URL IN THE REGISTRY...

@tomastrajan

AND IF CASE IF YES RETURN THE STORED PROMISE

@tomastrajan

ELSE WE HAVE TO DOWNLOAD ELEMENTS BUNDLE FOR THE FIRST TIME

@tomastrajan

WE CREATE A PROMISE AND STORE REFERENCES OF ITS HANDLER FUNCTIONs

@tomastrajan

IMMEDIATELY STORE URL & THE NEW PROMISE IN THE REGISTRY...

NEXT, we want to DOWNLOAD THE ELEMENT BUNDLE USING <SCRIPT> TAG

@tomastrajan

@tomastrajan

...NOTIFY THE PROMISE ONCE LOADED (or ERROR)

... SET ELEMENT BUNDLE URL

@tomastrajan

...APPEND THE SCRIPT TAG TO TRIGGER LOADING

@tomastrajan

...AND RETURN THE PROMISE!

@tomastrajan

BY THE WAY...

THIS ALSO WORKS WITH ANGULAR IVY🌿

@tomastrajan

WE SAID ITS LAZY, BUT HOW LAZY?!

@tomastrajan

THE ELEMENT IS HIDDEN BEHING *ngIF

WHEN IT WILL BE LOADED?

WHAT DO YOU THINK?😉

@tomastrajan

THAT's RIGHT...

THE ELEMENT BUNDLE WILL BE LOADED ONLY ONCE THE *NGIF EVALUATES TO TRUE AND ELEMENT IS RENDERED!

@tomastrajan

SO YEAH, AS LAZY AS IT GETS 😹

@tomastrajan

DEVELOPER EXPERIENCE

@tomastrajan

CONFIGURATION

PRE-CONFIGURE URL

LOADING & ERROR STATE COMPONENTS...

AND EVEN PRE-LOADING!

PER MODULE...

AND USE WITH EASE!

@tomastrajan

CONFIGURATION

POSSIBLE TO OVERRIDE LOCALLY IN THE TEMPLATE

@tomastrajan

BACK TO OUR REQUIREMENT...

👍 SOLVED  !

@tomastrajan

COOL, BUT THAT'S NOT REALLY MICROFRONTENDS, RIGHT?

@tomastrajan

COMMUNITY FEEDBACK

THIS NEEDS TO BE MORE DYNAMIC!

I WANT LOAD CONFIG FROM BACKEND DURING RUNTIME!

I WANT TO CONFIGURE TAG USING A VARIABLE

WE WANT TO BUILD MICROFRONTEEEENDS!

@tomastrajan

OK...

@tomastrajan

HERE YOU GO...

DYNAMIC TAG

STANDARD ANguLAR TEMPLATE BINDING WORKS STILL!

@tomastrajan

RETRIEVE CONFIG FROM BACKEND...

RENDER MULTIPLE DYNAMIC ELEMENTS...

CONFIG EXAMPLE...

@tomastrajan

HOW DOES IT WORK?

@tomastrajan

ALMOST THE SAME AS         

    *AXLAZYELEMENT BUT...

WE HAVE TO OVERRIDE ELEMENT NAME IN THE TEMPLATE...

@tomastrajan

ANG GUESS WHAT...

THIS WORKS WITH ANGULAR IVY🌿

OUT OF THE BOX

@tomastrajan

WHAT ABOUT THE MONOREPOS?

@tomastrajan

KNOWN ISSUES ?

WITH ZONE.js...

STORE PARENT ZONE ON THE WINDOW...

... and pass it into element AT bootstrap

@tomastrajan

QUICK DEMO TIME

@tomastrajan

LEARN MORE

@tomastrajan

GET IN TOUCH 

@tomastrajan

tomastrajan

tomastrajan.code

Tomas Trajan

Google Developer Expert

tomastrajan

Angular Zurich

@AngularZurich

angularzrh

Angular Zurich

www.tomastrajan.com

@tomastrajan

GET IN TOUCH

npx tomastrajan

@tomastrajan

TAKEAWAYS

There are many real world use cases 

ANGULAR IS A GREAT CHOICE FOR MICROFRONTENDs

CHECK OUT @ANGULAR-EXTENSIONS/ELEMENTS LIB

ALSO LET'S MEET AND CHAT ABOUT

@tomastrajan

 THANK YOU FOR YOUR ATTENTION!

FOLLOW ME

Angular Elements - Microfrontends (25m)

By Tomáš Trajan

Made with Slides.com

Angular Elements - Microfrontends (25m)

Talk about the best way how to lazy load Angular Elements and how to use it to build dynamic configurable microfrontends

  • 1,726

More from Tomáš Trajan